CLASS-7
INTRODUCTION OF INTEGERS

INTEGERS

As we know that, the collection of numbers …………, -7, -6, - 5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7,..………. are called integers whereas …………, -7, -6, - 5, -4, -3, -2,…… are called negative integers and 1, 2, 3, 4, 5, 6, 7,..………. are called positive integers. The integers zero ‘0’ is neither positive nor negative integers. The set of integers is denoted by I or Z and N ⊆ I or Z and  W ⊆ I or Z.

To be remembered – a) All positive integers are more than Zero and all negative integers are less than zero.

b) All and every positive integers are greater than all and every negative integers

c) Given two positive integers, the one with the bigger absolute value is greater, and given two negative integers the one with the smaller absolute value is greater.

d) The absolute value of an integer is the whole number obtained by disregarding its sign, the absolute value of an integers ‘b’ is denoted by  (+b)